There’s the mailman, mailwoman and the doorman, doorwoman, the pet sitter and personal trainer, not to forget the housekeeper, home healthcare worker and many others. So just who do you tip this holiday season and how much? Sharon Schweitzer, an international etiquette expert, author, and the founder of Protocol & Etiquette Worldwide, offers this simple tipping checklist of which service providers you need to tip this holiday season and how much:

The United States Postal Service provides the public with a tipping and gift receiving policy on their website, FedEx and UPS do not. The information provided for FedEx and UPS is from customer service representatives who preferred not to give their names.